20+ World War 1 Unsolved Mysteries Background. The first world war saw atleast 20 million people lose their lives. Russian submarine hunts the last czars' hoard of gold from the depths of a siberian lake legend has it that a series of railway wagons filled with gold sank into a lake in.

Here are 10 of the greatest.

See also 'battlefield tours', 'first world war medals'. In any war, a certain element of secretiveness is part of the game and world war ii was no exception. Will you help solve them? Unsolved mysteries of world wa language :